在导航栏iPad monotouch的后退按钮右侧设置一个按钮

Question

我想在导航栏中的后退按钮右侧有一个uibarbuttonitem（如果苹果指南行没有错误）。我使用这段代码：

UIBarButtonItem listButton = new UIBarButtonItem ("List View",UIBarButtonItemStyle.Bordered ,null);


        //assigning left bar buttons
        this.NavigationItem .LeftBarButtonItems =
        new UIBarButtonItem[] { this.NavigationItem .BackBarButtonItem   ,listButton }  ;

但this.NavigationItem .BackBarButtonItem始终为空。什么解决方案适合这个目的？

Answer 1

这是正确的实现方式：

UIButton *leftButtonIcon = [[UIButton alloc] initWithFrame:CGRectMake(0.0f, 0.0f, width, height)];
[leftButtonIcon setImage:[UIImage imageNamed:@"yourButtonImageName.png"] forState:UIControlStateNormal];
[leftButtonIcon addTarget:self.viewDeckController action:@selector(YourSelectorMethod) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *leftbtn = [[UIBarButtonItem alloc] initWithCustomView:leftButtonIcon];
[self.navigationItem setLeftBarButtonItem:leftbtn];